Paper folding and wire stitching machine



Dec. 22, 1931.

, o. KLEINSCHMIT 1,837,910 PAPER FOLDING AND WIRE STITCHING MACHINEFiled Oct. 5, 1929 3Sheets-Sheet 1 flwewron Dec. 22, 1931.

Fig. 2.

O. KLEINSCHMIT Filed Oct. 5, 1929 M PAPER FOLDING AND WIRE STITCHINGMACHINE 3 Shims-Sheet 2 RTTORNE 76.

Dec. 22, 1931. o. KLEINSCHMIT PAPER FOLDING AND WIRE STITCHING MACHINEFiled Oct. 5, 1929 3 Sheets-Sheet 3 Patented Dec. 22, 1 9 31 UNITEDSTATES PATENT OFFICE OSCAR KLEIKSCHMIT, OF LEIPZIGPLA GWIT Z, GERMANY,ASSIGNOR T GEBRUDER v BREHMER, MASCHINEN-FABRIK, OF LEIPZIGr-PLAGWITZ,GERMANY PAPER FOLDING AND WIRE sTITcHrNG IlIACHINE Application filedOctober 5, 1929. Serial No. 397,660.

This invention relates to paper folding and wire stitching machines bywhich sheets of paper are folded and bound together in the form ofphamphlets or books, the single sheets being successively conveyed to ase- I folded-sheet as if such were present, and are apt to clog thestitcher heads. This disadvantage is obviatedby the present invention asaccording thereto the stapling mechanism is only operated to feed thestaples when a signature is actually present and in the course of itstravel to the stitcher heads.

-The means employed for carrying out the invention may be operatedmechanically, electrically or magnetically.

I may for example employ a pivoted detector adapted to project into thepath of travel, of, and to be tripped by, the folded sheet therebythrowing in clutch mechanism whereby the stapling mechanism is put intooperation. By this means the staples are only fed when there is asignature actually present during the regular working of the machinewhen one sheet follows another continuously and they are successivelydealt with by the folding mechanism.

The construction of the clutch'and the construction and arrangement ofthe parts that are operated by the travelling sheet may be of anyconvenient kind but in order that the invention may be readilyunderstood and carried into practice I have illustrated a convenientform of mechanism in the accompanyin'g drawings in which similarreference characters relate .to like parts throughout the severalfigures and in which V Figure 1 is a general view of the machine partlydiagrammatic and showing the application of my invention thereto.

Figures 2, 3, 4 and are detail views to a larger scale.

Figures 2 and 3 show alternative positions gf the detector and the partsoperated there- Figure 4 is a similar view to Figure 2 partly in sectionwith the clutch and the stapling mechanism driving shaft omitted andFigure 5 is a plan view.

Referring firsti to Figure 1 of the said drawings, which shows somewhatdiagrammatically the general features of the known type of machinepreviously ref-erred to, it will be seen therefrom that a sheet of paperto be folded is placed on the'folding table a and is forced by the blade6 between the fold rolls 0. The folded sheet is then carried on set ofrolls 0 where it receives a further fold and so on being eventuallycarried by the tapes d beneath the heads of the stapling mechanism Swhere, prior to the last fold of the signature being effected, therequisite number of wire staples are applied thereto.

According to the present invention as previously explained a detectorrepresented at e is placed in the path of the travelling sheet as shownin Figure 1 and this device and the manner in which the same is operatedwill now. be described in detail with particular reference to Figures 2to 5 of the drawings.

The detector 6 is pivotally mounted on the pin f carried by the bracket9 secured to the cross bar h of the main frame of the machine. I

Also carried on the pin 7 is the lever 71 which carries a pin is withwhich one end of the detent lever j is adapted to engage. This detentlever j is mounted on the spindle m carried on brackets secured to thebar it, one of these brackets being shown at Z. Mounted on the spindle mis a toggle lever n which mterengages by means of the pin p with itsco-acting toggle lever o mounted on the spin: dle 9 that is carri i inthe bracket 6 secured to the main frame or the chine.

Also fixed on the spin e is the lever r loo that is anchored to the barIt by the spring .9 and carries a roller t that contacts with the cam vmounted on the main shaft u, on the end of which is fixed the bevelwheel w that meshes with the bevel wheel w mounted on the end of theshaft 2 driving the stapling mechanism.

The spindle g carries a lever y in which is mounted a pin y that carriesa slide 2 slidably mounted in the block 3 formed integral with thebracket 6. The upper end 4 of the slide 2 forms a stop adapted toproject into the path of a stop 5 depending from the movable member ofthe clutch w mounted on the shaft 2 adjacent to the bevel wheel '21).

The operation of the parts describedmay be briefly indicated as followsOnthe sheets folded in the manner previously described with reference toFigure 1 forming a signature A and carried on the tapes d coming intocontact in the course of their travel with 'the detector 6, this beingpivotally mounted on the pin f will be swung over thereby into theposition shown in Figures 1 and 3 of the drawings. This movement of thedetector 6 through the lever i frees the pin from the detent lever jwhich accordingly falls from the position shown in Figures 2 and 4 intothe position shown in Figure 3, thereby rocking the spindle m andswinging the lever 1- so that the roller 25 by action of the springs isforced from its position on the high part of the cam 'v as showninFigure 4 into the position shown in Figure 3 in which it engages withthe recess a of the cam '12.

Simultaneously with this movement, due to the interconnection of thetoggle levers n and 0 the spindle g is likewise rocked thus operatingthe lever 1 to draw down the slide 2 and thereby withdraw the pin 4 sothat it isout of the path of the depending pin 5, whereupon the movablemember of the clutch m is freed andthe clutch w is thrown intoengagement, with consequent rotation of the shaft 2 and the putting intooperation of the stapling mechanism.

It will be understood that the shaft u is driven continuously from themain driving source of the machine so that the gear wheels moveinent ofrotation is only imparted to the shaft'z driving the stapling mechanismwhen the clutch w is thrown in as previously explained, so that thestapling mechanism is only ut into operation when a signature is act'ualy being conveyed on the tapes d and throws over armi depresses thedetector e.

What I claim is In a signature stitching machine, stitching mechanism,signature feeding means, operating means for the stitching mechanismincluding a clutch disposed beneath said feeding means, a detectorpivotally mounted on the machine and normally projecting into the pathof the fed signatures and adapted to be displaced thereby to a planebelow the 'ath of the fed signatures, a pivotally mounte detent levernormally held in raised position by said detector and adapted to swingdownwardly when said detector is displaced, a sec.- o'nd lever connectedto said detent lever, a

main shaft-carried by the machine, a cam on said shaft operativelyengaged with said second lever to raise said detent lever, and meanscontrolled by said detent lever to operate said clutch when saiddetector is displaced by contact with the fed signatures.

, In testimony whereof I aflix my signature.

OSCAR KLEINSCHMIT.

w and w are constantly rotated but this

